Self contained 9 volt battery in a snap-in compartment on the back
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Voltage accuracy +/- 1% at temperature range of 0 to 65 degrees Celsius
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Voltage range: .001 volts to 1.000 volts
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Large 5/8" by 1 3/4" LCD voltage readout screen
Editorial Reviews:
Product Description The Pro-Troll Black Box is a device used with a downrigger to place a very small electrical charge on a downrigger cable. Many species of fish are attracted to this charge including salmon trout halibut sturgeon shark and many others. The latest computer chip technology has allowed construction of a Black Box that has superior operating features but is substantially lower in cost than any other unit on the market.
